You bow to the three skeletons and hold a small funeral for them. After this, you moved on to the next floor.
Floor 5050: On this floor, you found a single girl doll, apparently in a permanent state of nodding, its head bobbing up and down. You nodded, although confused, before proceeding on to the next.

You returned to the building and proceed on to the next floor.
Floor 5047: Upon arrival, you saw a giant pile of potatoes. Apparently, this is the potato storage room. You decided to cook and eat some before proceeding on to the next floor.

Floor 5043: As you step into this mostly empty room, you notice a single, warm, comfy bed at one corner of the room, and working desk gently emitting a calm, nostalgic atmosphere next to it. On the desk is a piece of paper that reads:
Dear [your name], who I do not know.
It must have been a long and exhausting trip up here. I hope you're still fine and happy. Well, I don't know if you still have somebody waiting for you at the surface, but if it's your wish to go up further, then feel free to continue your adventure. I've prepared some gifts for you in this humble room, as you may have already noticed. I'm sorry that I cannot help you any more than this, but please, take these.
I wish you safe travel,
There are some supplies in the room, including some water, food, and medical kits. You decided to take them, then take a short rest on the bed, although the word 'short' may or may not really mean anything at this point, as you feel that the time is getting more and more erratic as you climb up this seemingly endless spire.
When you wake up again, you check around the room for the last time. There is a parachute which you can use to return to the surface safely, so you decided to take it even though you do not have any plan to return there. A glance at the letter, you're surprised that its contents have changed. This time it wrote:
Thank you for helping us.
Stepping out of the room, a transparent cube appeared in front of you. You took it and put it in your backpack.
You've obtained a piece of the memories of the Planet.
You smiled softly, before continuing your advance to the next floor.